Service difficulty report · Seal

Difficulty date
December 23, 2020
Submitted
March 8, 2021
Operation
General aviation
Engine
Ge GE90115B
Engine time
25,404 hours, 4,024 cycles
Part
Seal
Part number
2517M71P01
Part serial
NCU22213
Condition
Cracked
Location
Enging Hpt
Part time
25,404 hours, 4,024 cycles
Stage of operation
IN
How discovered
D
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

GE90 ESN 907757 AT THE GE OVERHAUL SHOP AT INCOMING INSPECTION. DURING CRACK DETECTION OF THE HPT FORWARD SEAL 2 OFF RADIAL CRACKS WERE FOUND IN THE AFT MOST SERRATION OF THE OD SEAL SERRATIONS. THE LENGTH OF THE CRACKS ARE 0.091" AND 0.052". CONDITION OBSERVED IS OUTSIDE OF PUBLISHED ESM LIMITS. IN ADDITION THE OEM HAS REJECTED PREVIOUS DR REQUESTS (00692409)FOR THIS CONDITION ON OTHER COMPONENTS. COMPONENT IS AN LLP AND AS SUCH APPLICABLE TO AMC 20/8.